| 摘要 |
The invention relates to a method of producing hot-rolled strips that are characterized by a high plasticity and an increased strength. To this end, a hot-rolled strip (W) is used, starting from continuously cast slabs, especially in the form of slabs that are re-heated or used directly from the casting heat, from thin slabs or from a cast strip. The steel used contains (in weight-%) C: 0.001 - 1.05 %, Si: </= 1.5 %, Mn: 0.05 - 3.5 %, Al: </= 2.5 %, optionally additional elements such as Cu, Ni, Mo, N, Ti, Nb, V, Zn, B, P, Cr, Ca and/or S, and the remainder iron as well as conventional companion elements. The strip is then finished by continuos rolling and is continuously cooled off. Cooling off is performed in at least two subsequent cooling phases (tCK, tLK) of accelerated cooling to a final temperature, the first cooling phase (tCK) of accelerated cooling starting at least three seconds after the last reduction stage of the finish-rolling and the hot-rolled strip (W) being cooled off during the first cooling phase (tCK) of accelerated cooling at a cooling rate of at least 150 DEG C/s. |
| 申请人 |
THYSSEN KRUPP STAHL AG;KAWALLA, RUDOLF;PIRCHER, HANS;HELLER, THOMAS;ENGL, BERNHARD;TESE, PINO |
发明人 |
KAWALLA, RUDOLF;PIRCHER, HANS;HELLER, THOMAS;ENGL, BERNHARD;TESE, PINO |
